A has both 6 and -6 as a answer
Answer:
19 and 2
Step-by-step explanation:
Let x represent the first number and y represents second number
x + y = 19
x - y = 17 add two equations up
2x = 36 divide both sides by 2
x = 19 and since the difference is 17 the other number is 2
Answer:
n= -2
Step-by-step explanation:
3^n = 1/9
3^n = 1/(3^2)
3^n = 3^(-2)
n = -2
Answer:the coastline is 20000 miles.
The land boundaries are 12000 miles.
Step-by-step explanation:
The length of the entire border of the Unites States is approximately 32,000 miles.
5/8 of the entire length is the coastline. It means that the length of the coastline of the U.S would be
5/8 × 32000 = 20000 miles.
Therefore, the length of the boundaries of the US would be
32000 - 20000 = 12000 miles.
Answer:
The sample mean is 
and the sample median is 0.56
Step-by-step explanation:
The sample mean 
of observations 
is given by
Applying the above definition we get that
The sum of these 15 sample observations is
and the sample mean is
The sample median is obtained by first ordering the <em>n</em> observations from smallest to largest (with any repeated values included so that every sample observation appears in the ordered list). Then,
Sample median = The single middle value if n is odd = 
Sample median = The average of the two middle values if n is even = average of 
and 
Applying the above definition we get that
The data is already ordered and n = 15 so,
Sample median = 
= 0.56
